Double Glazing Misted Double Glazing: Why the Fog Appears Between the Panes and How to Replace Just the Unit Grey mist between the panes means the sealed unit has failed, not the window. Here is how to confirm it, what a replacement unit costs in 2026, how the safety glass rules apply and when a careful DIYer can fit one.
secondary glazing Secondary Glazing vs Double Glazing: What a Period Property Actually Needs Secondary glazing costs roughly half as much as heritage-style double glazing and sidesteps most of the planning and Building Regs hurdles that come with full replacement -- here's when each option actually makes sense.
